1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![unstable(reason = "not public", issue = "0", feature = "fd")]
use io::{self, Read};
use libc::{self, c_int, c_void};
use mem;
use sys::cvt;
use sys_common::AsInner;
use sys_common::io::read_to_end_uninitialized;
pub struct FileDesc {
fd: c_int,
}
impl FileDesc {
pub fn new(fd: c_int) -> FileDesc {
FileDesc { fd: fd }
}
pub fn raw(&self) -> c_int { self.fd }
/// Extracts the actual filedescriptor without closing it.
pub fn into_raw(self) -> c_int {
let fd = self.fd;
mem::forget(self);
fd
}
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
let ret = cvt(unsafe {
libc::read(self.fd,
buf.as_mut_ptr() as *mut c_void,
buf.len())
})?;
Ok(ret as usize)
}
pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
let mut me = self;
(&mut me).read_to_end(buf)
}
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
let ret = cvt(unsafe {
libc::write(self.fd,
buf.as_ptr() as *const c_void,
buf.len())
})?;
Ok(ret as usize)
}
pub fn set_cloexec(&self) -> io::Result<()> {
unimplemented!();
/*
unsafe {
let previous = cvt(libc::fcntl(self.fd, libc::F_GETFD, 0))?;
cvt(libc::fcntl(self.fd, libc::F_SETFD, previous | libc::FD_CLOEXEC))?;
Ok(())
}
*/
}
pub fn set_nonblocking(&self, _nonblocking: bool) -> io::Result<()> {
unimplemented!();
/*
unsafe {
let previous = cvt(libc::fcntl(self.fd, libc::F_GETFL, 0))?;
let new = if nonblocking {
previous | libc::O_NONBLOCK
} else {
previous & !libc::O_NONBLOCK
};
cvt(libc::fcntl(self.fd, libc::F_SETFL, new))?;
Ok(())
}
*/
}
pub fn duplicate(&self) -> io::Result<FileDesc> {
let new_fd = cvt(unsafe { libc::dup(self.fd) })?;
Ok(FileDesc::new(new_fd))
}
}
impl<'a> Read for &'a FileDesc {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
(**self).read(buf)
}
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
unsafe { read_to_end_uninitialized(self, buf) }
}
}
impl AsInner<c_int> for FileDesc {
fn as_inner(&self) -> &c_int { &self.fd }
}
impl Drop for FileDesc {
fn drop(&mut self) {
// Note that errors are ignored when closing a file descriptor. The
// reason for this is that if an error occurs we don't actually know if
// the file descriptor was closed or not, and if we retried (for
// something like EINTR), we might close another valid file descriptor
// (opened after we closed ours.
let _ = unsafe { libc::close(self.fd) };
}
}
|
